I am also a family of 5 and did not want to pay for 2 rooms when I know that my just turned 3 yr old will be in my bed in the middle of the night. Carnival will allow you to have 5 people in a standard room. There are the 4 beds and then they will bring in a portable roll away bed for the 5th person if necessary. Although the options that others have give would allow for more room, you really do not spend much time in your room anyway. When you are there it is only to sleep or get ready to go "somewhere".